From what I've read and seen of the kit so far, it seems as though the wing retaining clips being at the front of the joiner master section allow the movement of the rear section of the joint, allowing enough of a gap to cause problems with the servo connections. Maybe a dowel in the end of the CF wing bracing spars that marry up with the opposite wing spars, giving more rigidity to the joint. Or maybe somehow inserting elastic shock cords into the rear spars to keep tension on the rear of the joint while the clips take care of the front end. Am eagerly looking forward to hearing other peoples ideas or mods. As Cularis has only recently arrived I think I will source the other items required for the build first, allowing joint solutions to come forth before crossing the bridge myself.